I think that a HoT style healer would be amazing (and fit with the whole Time Mage thing they have going on with AST), since AST will pretty much replace one of the healers if we gain SCH's utility or WHM's healing. If you really like one of the stances then you would probably like the original job a lot more. There's pretty much no reason to play AST at this point unless you like the idea of buffing so I doubt many people would be angry if we suddenly had our healing changed to be unique.